package com.heima.app.gateway.filter;



import com.heima.utils.common.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
@Slf4j
public class AuthorizeFilter implements Ordered, GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        if (request.getURI().getPath().contains("/login")) {
            log.info("1");
            return chain.filter(exchange);
        }

        //获取请求头的token
        HttpHeaders headers = request.getHeaders();
        String token = headers.getFirst("token");
        System.out.println("token" + token);


        if (StringUtils.isBlank(token)) {
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        try {

            //解析token
            Claims claimsBody = AppJwtUtil.getClaimsBody(token);

            int result = AppJwtUtil.verifyToken(claimsBody);
            if (result == 1 || result == 2) {
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }

                Object id = claimsBody.get("id");
                ServerHttpRequest serverHttpRequest = request.mutate().headers(httpHeaders -> {
                    httpHeaders.add("id", id.toString());
                }).build();
                exchange.mutate().request(serverHttpRequest).build();

                return chain.filter(exchange);

        } catch (Exception e) {
            e.printStackTrace();
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

    }


        @Override
        public int getOrder () {
            return 0;
        }
    }
